Ke kaʻina hana graphite electrode

Mea maka a me ke kaʻina hana o ka graphite electrode

ʻO ka graphite electrode kahi mea hana graphite conductive kiʻekiʻe i hoʻopaʻa ʻia e ka petroleum knead, needle coke ma ke ʻano he aggregate a me ka bitumen lanahu e like me ka binder, i hana ʻia ma o nā kaʻina hana e like me ka kneading, molding, roasting, impregnation, graphitization and mechanical processing. mea waiwai.

ʻO ka graphite electrode he mea koʻikoʻi kiʻekiʻe-mehana conductive mea no ka hana kila uila. Hoʻohana ʻia ka electrode graphite e hoʻokomo i ka ikehu uila i ka umu uila, a ʻo ka wela kiʻekiʻe i hana ʻia e ka arc ma waena o ka hopena electrode a hoʻohana ʻia ka uku e hoʻoheheʻe i ka uku no ka hana kila. ʻO nā kapuahi ʻeleʻele ʻē aʻe i honi i nā mea e like me ka phosphorus melemele, ka silikoni ʻenehana, a me nā abrasives hoʻohana pū i nā electrodes graphite e like me nā mea conductive. Hoʻohana nui ʻia ka maikaʻi a me nā waiwai kino a me nā kemika o nā electrodes graphite i nā ʻāpana ʻoihana ʻē aʻe.

ʻO nā mea maka no ka hana ʻana i nā electrodes graphite he petroleum coke, needle coke a me ka coal tar pitch.

ʻO ka Petroleum coke kahi huahana paʻa paʻa i loaʻa ma ke koena o ka lanahu coking a me ka pitch petroleum. He ʻeleʻele a porous ka waihoʻoluʻu, ʻo ke kalapona ka mea nui, a he haʻahaʻa loa ka ʻike lehu, ma lalo o 0.5%. No ka hui kalapona maʻalahi i kaha kiʻi ʻia ka Petroleum coke. ʻO ka Petroleum coke ka nui o ka hoʻohana ʻana i nā ʻoihana kemika a me ka metallurgical. ʻO ia ka mea kumu nui no ka hana ʻana i nā huahana graphite artificial a me nā huahana kalapona no ka alumini electrolytic.

Hiki ke hoʻokaʻawale ʻia ka coke petroleum i ʻelua ʻano: coke maka a me ka coke calcined e like me ka mahana mālama wela. ʻO ka coke petroleum mua i loaʻa ma ka coking lohi ka nui o nā volatiles, a he haʻahaʻa ka ikaika mechanical. Loaʻa ka coke calcined ma ka calcination o ka coke maka. ʻO ka hapa nui o nā hale hoʻoheheʻe ma Kina e hana i ka coke wale nō, a ʻo ka hana calcination ka hapa nui o nā mea kanu kalapona.

Hiki ke hoʻokaʻawale ʻia ka coke Petroleum i ka coke sulfur kiʻekiʻe (ʻoi aku ka nui o 1.5% sulfur), ka coke sulfur medium (loaʻa ka 0.5% -1.5% sulfur), a me ka coke sulfur haʻahaʻa (ʻoi aku ka liʻiliʻi o 0.5% sulfur). Hana ʻia ka hana ʻana o nā electrodes graphite a me nā huahana graphite artificial e hoʻohana ana i ka coke sulfur haʻahaʻa.

He ʻano coke ʻano kiʻekiʻe me ka fibrous kikokikona, haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa a me ka graphitization maʻalahi. Ke wāwahi ʻia ka coke, hiki ke hoʻokaʻawale ʻia i loko o nā ʻāpana liʻiliʻi e like me ke ʻano (ʻoi aku ka nui o ka ratio ma luna o 1.75). Hiki ke ʻike ʻia kahi hanana fibrous anisotropic ma lalo o kahi microscope polarizing, a no laila ua kapa ʻia ʻo ia ʻo needle coke.

ʻIke loa ka anisotropy o nā waiwai physico-mechanical o ka nila coke. Loaʻa iā ia ka conductivity uila a me ka wela e like me ke kuhikuhi axis lōʻihi o ka particle, a haʻahaʻa ka coefficient o ka hoʻonui wela. Ke hoʻoheheʻe ʻia, hoʻonohonoho ʻia ka axis lōʻihi o ka hapa nui o nā ʻāpana i ke kuhikuhi extrusion. No laila, ʻo ka nila coke ke kī nui no ka hana ʻana i nā electrodes graphite kiʻekiʻe a i ʻole ultra-high-power. ʻO ka graphite electrode i hana ʻia he haʻahaʻa haʻahaʻa haʻahaʻa, liʻiliʻi ka hoʻonui ʻana i ka wela a me ke kūpaʻa haʻalulu maikaʻi.

Hoʻokaʻawale ʻia ʻo Needle coke i loko o ka ʻaila coke ma muli o ka ʻaila i hana ʻia mai ke koena o ka ʻaila a me ka coke kola lanahu i hana ʻia mai nā mea maka.

ʻO ke kala lanahu kekahi o nā huahana nui o ka hana ʻana i ka hohonu. He hui ia o nā hydrocarbons like ʻole, ʻeleʻele i ka wela kiʻekiʻe, semi-solid a paʻa paha i ka wela kiʻekiʻe, ʻaʻohe wahi hoʻoheheʻe paʻa, palupalu ma hope o ka hoʻomehana ʻana, a laila hoʻoheheʻe ʻia, me ka density o 1.25-1.35 g / cm3. Wahi a kona wahi palupalu, ua māhele ʻia i ka wela haʻahaʻa, ka wela waena a me ka asphalt wela kiʻekiʻe. ʻO 54-56% o ka pā lanahu ka loaʻa ʻana o ka asphalt wela waena. He mea paʻakikī loa ka hoʻohui ʻana o ka coal tar, e pili ana i nā waiwai o ka coal tar a me ka ʻike o nā heteroatoms, a pili pū ʻia e ka ʻōnaehana coking process a me nā kūlana hoʻoili. Nui nā hōʻailona no ka hoʻohālikelike ʻana i ka pitch tar lanahu, e like me ka bitumen softening point, toluene insolubles (TI), quinoline insolubles (QI), coking values, and lanahu pitch rheology.

Hoʻohana ʻia ʻo Coal tar ma ke ʻano he mea hoʻopaʻa a impregnant i ka ʻoihana kalapona, a he hopena nui kāna hana i ke kaʻina hana a me ka maikaʻi o ka huahana o nā huahana kalapona. Hoʻohana maʻamau ka asphalt binder i ka asphalt i hoʻololi ʻia i ka wela-mehana a i ʻole ka wela wela me kahi wahi palupalu haʻahaʻa, kahi waiwai coking kiʻekiʻe, a me kahi resin β kiʻekiʻe. ʻO ka mea hana impregnating he asphalt wela haʻahaʻa me kahi haʻahaʻa haʻahaʻa haʻahaʻa, he QI haʻahaʻa, a me nā waiwai rheological maikaʻi.